Method of cleaning substrate processing apparatus

ABSTRACT

A method of cleaning blind spots around a substrate supporting apparatus by controlling a position of the substrate supporting apparatus includes moving the substrate supporting apparatus relative to a ring and supplying a cleaning gas to an upper space of the substrate supporting apparatus.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No. 10-2018-0154397, filed on Dec. 4, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

BACKGROUND 1. Field

One or more embodiments relate to a method of cleaning a substrate processing apparatus, and more particularly, to a method of cleaning a deposited thin film between a substrate supporting apparatus and a gas flow control ring by controlling a position of the substrate supporting apparatus.

2. Description of the Related Art

When processing a substrate in a reactor of an apparatus for processing semiconductors and displays, various chemicals are supplied. For example, a thin film is formed by periodically supplying chemicals to a substrate. However, in this case, chemicals may be unnecessarily deposited on inner walls of the reactor besides the substrate and may become a source of contamination in the reactor. For example, contaminants such as particles may fall onto the substrate and destroy structures on the substrate, or degrade the yield of devices. Thus, the process reproducibility and yield need to be maintained by periodically cleaning the reactor.

A substrate processing apparatus is cleaned typically by using a dry in-situ cleaning method in which a cleaning gas is used, and a cleaning gas having a fluorine (F) component (for example, NF₃, CIF₃, or F₂) is used. Dry cleaning may be performed at a certain period. For example, dry cleaning may be performed after processing a batch of substrates (1 batch=25 wafers), and a period of the cleaning may be set according to a process type or purpose.

However, there may be blind spots which are difficult to clean due to various components arranged in a reactor and due to a complex internal structure of the reactor that the cleaning gas does not reach. Undischarged, residual gases react with each other and remain as contaminants in the blind spots, thus contaminating a substrate during substrate processing, destroying substrate structures or degrading electrical characteristics of a device.

SUMMARY

One or more embodiments include a method of stably processing a substrate by removing contaminants in blind spots. One or more embodiments include a method of cleaning the blind spots while repairing deviation of centering of a substrate supporting apparatus due to a difference in thermal expansion between an upper wall and a lower wall of a chamber during a high temperature process and due to a difference in thermal expansion between upper and lower portions of a reactor.

Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

According to one or more embodiments, a method of cleaning a substrate processing apparatus including one or more reactors is provided, wherein each reactor includes: a substrate supporting apparatus; and a ring surrounding the substrate supporting apparatus, wherein a gap is present between the substrate supporting apparatus and the ring, and wherein an upper space of the substrate supporting apparatus communicates with a lower space of the substrate supporting apparatus via the gap, wherein the method includes: moving the substrate supporting apparatus relative to the ring; and supplying a cleaning gas to the upper space of the substrate supporting apparatus.

The moving of the substrate supporting apparatus relative to the ring may include: a first operation of moving the substrate supporting apparatus in a first direction by a first preset distance; a second operation of moving the substrate supporting apparatus in a second direction by the first preset distance; a third operation of moving the substrate supporting apparatus in the second direction by a second preset distance; and a fourth operation of moving the substrate supporting apparatus in the first direction by the second preset distance, wherein the second direction is opposite to the first direction.

The first direction or the second direction may be a thickness direction of the substrate supporting apparatus, e.g. a vertical direction with respect to the substrate supporting apparatus. The first preset distance may be equal to or less than a thickness of the substrate supporting apparatus. The second preset distance may be equal to or less than a thickness of the ring.

The first direction or the second direction may be a radius direction of the substrate supporting apparatus, e.g. a horizontal direction with respect to the top surface of the substrate supporting apparatus. The first preset distance or the second preset distance may be (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2.

The moving of the substrate supporting apparatus relative to the ring may include: a fifth operation of moving the substrate supporting apparatus in a third direction by a third preset distance; a sixth operation of moving the substrate supporting apparatus in a fourth direction by the third preset distance; a seventh operation of moving the substrate supporting apparatus in the fourth direction by a fourth preset distance; and an eighth operation of moving the substrate supporting apparatus in the third direction by the fourth preset distance, wherein the third direction may be opposite to the fourth direction and may be perpendicular to the first direction and the second direction. The cleaning gas may be continuously supplied in the first through fourth operations.

The cleaning gas may be supplied between the first operation and the second operation and between the third operation and the fourth operation.

The cleaning gas may be further supplied before the first operation, wherein a supply period of the cleaning gas between the first operation and the second operation and between the third operation and the fourth operation is less than a supply period before the first operation.

The method may further include supplying a gas to the lower space of the substrate supporting apparatus during an operation of supplying a cleaning gas to the upper space of the substrate supporting apparatus, wherein the gas supplied to the lower space prevents the cleaning gas in the upper space from entering the lower space through the gap.

During the supplying of a cleaning gas to the upper space of the substrate supporting apparatus, a thin layer deposited on a lateral surface of the substrate supporting apparatus or an internal lateral surface of the ring may be removed.

The method may be performed every time when a series of processings or a plurality of series of processings on one or more substrates are completed.

The method may be performed on each reactor simultaneously or at different times.

According to one or more embodiments, a method of cleaning a substrate processing apparatus including one or more reactors is provided, wherein each reactor includes: an upper body; a substrate supporting apparatus; and a ring surrounding the substrate supporting apparatus and arranged between the substrate supporting apparatus and the upper body, wherein the upper body and the substrate supporting apparatus form a reaction space, wherein the method includes: moving the substrate supporting apparatus to expose a portion of a lateral surface of the substrate supporting apparatus or a portion of an internal lateral surface of the ring, to a reaction space; and supplying a cleaning gas to the reaction space.

While supplying a cleaning gas to the reaction space, an exposed portion of the lateral surface of the substrate supporting apparatus or an exposed portion of the internal lateral surface of the ring may be cleaned.

According to one or more embodiments, a substrate processing method of a substrate processing apparatus including a plurality of reactors is provided, wherein each reactor includes: a substrate supporting apparatus; and a ring surrounding the substrate supporting apparatus, wherein a gap is present between the substrate supporting apparatus and the ring, wherein a surface of the ring is in contact with the substrate supporting apparatus as the substrate supporting apparatus moves and is installed to be movable via a pushing force of the substrate supporting apparatus, wherein the substrate processing method includes: a first operation of moving the substrate supporting apparatus in a first direction by a first preset distance; a second operation of moving the substrate supporting apparatus in a second direction by a second preset distance; a third operation of moving the substrate supporting apparatus in the second direction by the first preset distance; a fourth operation of moving the substrate supporting apparatus in the first direction by the second preset distance; a fifth operation of moving the substrate supporting apparatus in a third direction by the first preset distance; a sixth operation of moving the substrate supporting apparatus in a fourth direction by the second preset distance; a seventh operation of moving the substrate supporting apparatus in the fourth direction by the first preset distance; an eighth operation of moving the substrate supporting apparatus in the third direction by the second preset distance; and supplying a cleaning gas to an upper portion of the substrate supporting apparatus, wherein the second direction is opposite to the first direction, and the fourth direction is perpendicular to the first direction and the second direction and is opposite to the third direction.

The supplying of a cleaning gas to the upper portion of the substrate supporting apparatus may be continuously performed during the first operation through the eighth operation, or between the first operation and the second operation, between the third operation and the fourth operation, between the fifth operation and the sixth operation, and between the seventh operation and the eighth operation.

The first preset distance may be equal to or greater than (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2, wherein the second preset distance may be (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2, wherein the substrate supporting apparatus is centered relative to the ring, and at the same time, a lateral surface of the substrate supporting apparatus and an internal lateral surface of the ring are cleaned by the substrate processing method.

According to the present disclosure, contaminants existing in blind spots in a reactor may be removed. According to the present disclosure, cleaning may be efficiently performed by vertically or horizontally moving the substrate supporting apparatus, and also, blind spots may be cleaned without additional wet cleaning and without having to disassemble the substrate processing apparatus. Thus maintenance of the substrate processing apparatus becomes easy. Therefore, degradation in productivity of the substrate processing apparatus due to maintenance may be minimized.

In addition, according to the present disclosure, deviation of centering of the substrate supporting apparatus due to a difference in thermal expansion between an upper portion and a lower portion of a reactor may be corrected, and at the same time, blind spots may be cleaned. Thus, post-processing time may be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

FIG. 1 schematically illustrates a substrate processing apparatus according to embodiments of the present disclosure;

FIG. 2 illustrates a substrate processing apparatus according to embodiments of the present disclosure, which includes two or more reactors;

FIG. 3 schematically shows a flow of a process gas and a filling gas in a gap between a substrate supporting apparatus and a ring;

FIG. 4 illustrates a substrate processing apparatus according to embodiments of the present disclosure, which includes two or more reactors;

FIG. 5 schematically illustrates an alignment apparatus of a substrate processing apparatus according to embodiments of the present disclosure;

FIG. 6 schematically illustrates an alignment apparatus supporting module of a substrate processing apparatus according to embodiments of the present disclosure;

FIG. 7 is an expanded view of a portion of a reactor of FIG. 1;

FIG. 8 is an expanded view of a portion G of FIG. 7, illustrating a layer deposited between a ring and a substrate supporting apparatus;

FIG. 9 schematically illustrates a method of cleaning a substrate processing apparatus according to embodiments of the present disclosure;

FIG. 10 is a modified example of the cleaning method of FIG. 9;

FIGS. 11A through 11G illustrate a process of cleaning the substrate processing apparatus of FIG. 1 by using the cleaning method of FIG. 10;

FIG. 12 schematically illustrates a method of cleaning a substrate processing apparatus according to other embodiments of the present disclosure;

FIGS. 13A through 13G illustrate a process of cleaning the substrate processing apparatus of FIG. 1 by using the cleaning method of FIG. 12;

FIG. 14 is a plan view of a process of cleaning a gap between a substrate supporting apparatus and a ring, by using a cleaning method according to embodiments of the present disclosure, viewed from above the substrate supporting apparatus;

FIG. 15 illustrates an example where a centering location of a substrate supporting apparatus is deviated after a substrate processing process, and a thin layer is deposited on the lateral sides of the substrate supporting apparatus and the ring;

FIG. 16 schematically illustrates a substrate processing method according to embodiments of the present disclosure; and

FIGS. 17A through 17F schematically illustrate a method of cleaning a substrate supporting apparatus of FIG. 15 simultaneously while centering the substrate supporting apparatus relative to the ring, by using the substrate processing method of FIG. 16.

DETAILED DESCRIPTION

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments are merely described below, by referring to the figures, to explain aspects of the present description.

Hereinafter, the present disclosure will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown. In the drawings, like elements are labeled like reference numerals and repeated description thereof will be omitted. This present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those of ordinary skill in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.

In the present description, terms such as ‘first’, ‘second’, etc. are used to describe various members, areas, and/or portions. However, it is obvious that the members, areas, layers, and/or portions should not be defined by these terms. The terms should not be construed as indicating any particular order, the upper or lower position, or superiority or inferiority, and are used only for distinguishing one member, area, or a portion from another member, area, or portion. Thus, a first member, area, layer or portion which will be described may also refer to a second member, area or portion, without departing from the teaching of the present disclosure.

In the drawings, for example, according to the manufacturing techniques and/or tolerances, shapes of the illustrated elements may be modified. Thus, the present disclosure should not be construed as being limited to the embodiments set forth herein, and should include, for example, variations in the shapes caused during manufacturing.

FIG. 1 schematically illustrates a cross-section of a reactor of a substrate processing apparatus according to embodiments of the present disclosure.

As illustrated in FIG. 1, the substrate processing apparatus may have a dual chamber structure including a reactor in a chamber 24. A reactor in the chamber 24 of the substrate processing apparatus may include an upper body 16. In addition, the reactor may include a substrate supporting apparatus 3 and a ring 8 surrounding the substrate supporting apparatus 3.

The reactor may be a reactor in which an atomic layer deposition (ALD) process or a chemical vapor deposition (CVD) process is performed.

The upper body 16 of the reactor may include a first gas inlet portion 1, a gas supplying portion 2, discharging portions 6 and 7, and the ring 8. The upper body 16 and the substrate supporting apparatus 3 may form a reaction space 5. A chamber upper wall 17, a chamber sidewall 23, a chamber lower wall 20, and the substrate supporting apparatus 3 may form a chamber inner space 10. A second gas inlet portion 9 may be formed in a side surface of the chamber lower wall 20.

The ring 8 may surround the substrate supporting apparatus 3 and may be arranged between the substrate supporting apparatus 3 and the upper body 16. The ring 8 may generally have a circular ring shape, but is not limited thereto. For example, when the substrate supporting apparatus 3 is rectangular, the ring 8 may have a rectangular ring shape. The ring 8 may be fixed to the upper body 16.

According to other embodiments, the ring 8 may further include a stopper in a lower portion of the ring 8. The stopper may prevent the ring 8 from moving inwards to the upper body 16. The stopper may be arranged between an inner sidewall and a lower surface of the ring 8.

A gap G may be present between the ring 8 and the substrate supporting apparatus 3. An upper space of the substrate supporting apparatus 3 and a lower space of the substrate supporting apparatus 3 may communicate with each other via the gap G. That is, the reaction space 5 and the chamber inner space 10 may communicate with each other via the gap G.

The substrate supporting apparatus 3 may include a susceptor main body (not shown) supporting a substrate, and a heater heating the substrate supported by the susceptor main body. The substrate supporting apparatus 3 may be connected to a driving motor 11 provided at one side of the substrate supporting apparatus 3 and configured to be vertically movable to load or unload a substrate. In detail, during substrate processing, the substrate supporting apparatus 3 on which a substrate is mounted is lifted up to thereby maintain a processible distance between the gas supplying portion 2 and a substrate. When the substrate supporting apparatus 3 is lifted, the substrate supporting apparatus 3 may form the reaction space 5 with the gas supplying portion 2 and the upper body 16. When a substrate process is completed, the substrate supporting apparatus 3 may be lowered to a substrate unloading position and unload a substrate. Next, the substrate supporting apparatus 3 may load a next substrate, or may be lifted without loading a substrate.

An alignment apparatus 14 and a controller 15 may be further included between the substrate supporting apparatus 3 and the driving motor 11.

The alignment apparatus 14 and the controller 15 may be supported via an assembly supporting plate 21.

The alignment apparatus 14 may be configured to move the substrate supporting apparatus 3. For example, the alignment apparatus 14 may align the substrate supporting apparatus 3 within the reactor by aligning a horizontal position of the substrate supporting apparatus 3.

The controller 15 is connected to the alignment apparatus 14 and may be configured to control the alignment apparatus 14 to control movement of the substrate supporting apparatus 3.

Examples of the method of aligning the substrate supporting apparatus 3 by using the alignment apparatus 14 and the controller 15 are disclosed in detail in U.S. Ser. No. 16/655,217 and U.S. Ser. No. 16/601,593.

A stretchable portion 12 may be arranged between the chamber lower wall 20 and the alignment apparatus 14. The stretchable portion 12 may connect the chamber lower wall 20 to the alignment apparatus 14 and separate the chamber inner space 10 from the outside.

The stretchable portion 12 may expand or contract according to movement of the substrate supporting apparatus 3. For example, the stretchable portion 12 may include a corrugated structure (for example, a bellows). In this case, when the substrate supporting apparatus 3 is lifted via the driving motor 11, the stretchable portion 12 may contract; when the substrate supporting apparatus 3 is lowered via the driving motor 11, the stretchable portion 12 may expand.

According to a selective embodiment, the stretchable portion 12 may be configured to be elastic. For example, elasticity of the stretchable portion 12 may be adjusted such that the stretchable portion 12 expands or contracts in response to vertical movement of the substrate supporting apparatus 3, and accordingly, shielding between the chamber lower wall 20 and the alignment apparatus 14 from the outside may be maintained.

A process gas that has entered through the first gas inlet portion 1 may be supplied to the reaction space 5 and the substrate via the gas supplying portion 2. The gas supplying portion 2 may be a shower head, and a base of the showerhead may include a plurality of gas supply holes formed to eject a process gas (for example, vertically). The process gas supplied onto the substrate may undergo a chemical reaction with the substrate or another gas to deposit a thin layer on the substrate or etch a thin layer.

In a plasma process, a radio frequency (RF) power source may be electrically connected to the gas supplying portion 2 that functions as one electrode. In detail, an RF rod 4 connected to the RF power source may be connected to the gas supplying portion 2. In this case, upper RF power is supplied to the gas supplying portion 2 via an RF generator, an RF matcher, and the RF rod 4, and as a reaction gas that has entered the reaction space 5 through the first gas inlet portion 1 is activated, plasma may be generated.

In the reaction space 5, a residual gas or unreacted gas remaining after chemical reaction with the substrate may be discharged to the outside via a gap between a discharge duct 6 and the ring 8 and a discharge space 7 in the discharge duct 6. The discharging method may be upward discharging, downward discharging or sideward discharging. Description of an additional discharging structure connecting a reactor and the chamber 24 will be omitted.

While a substrate processing apparatus including one reactor is illustrated in FIG. 1, an object of the cleaning method and the substrate processing method according to the present disclosure is not limited to one reactor that processes one substrate. In some embodiments, a substrate processing method may be used in a batch reactor (that is, a plurality of reactors) that processes a plurality of substrates each time, that is, a batch of substrates. A substrate processing apparatus including a plurality of reactors is illustrated in FIG. 2. In a chamber including a plurality of reactors, reactors in the chamber may share the lower space of the substrate supporting apparatus 3.

While each reactor including the controller 15 individually is illustrated in FIG. 2, according to another embodiment, each reactor may share one controller. That is, one controller may control movement of substrate supporting apparatuses of all reactors.

FIG. 3 schematically illustrates a flow of a process gas (or cleaning gas) and a filling gas in the gap G between the substrate supporting apparatus 3 and the ring 8.

Referring to FIG. 3, a process gas that has entered through the first gas inlet portion 1 may be supplied to the reaction space 5 and a substrate via the gas supplying portion 2.

In addition, a filling gas may enter the chamber inner space 10 through the second gas inlet portion 9. The filling gas may be, for example, an inert gas such as nitrogen or argon. Alternatively, in order to prevent generation of parasitic plasma in the lower space 10 when plasma is generated in the reaction space 5, a gas having a lower discharge rate than that of the gas supplied to the reaction space 5 may be supplied to the lower space 10 through the second gas inlet portion 9. The filling gas may form a gas curtain in the gap G between the substrate supporting apparatus 3 and the ring 8 to thereby prevent a corrosive reaction gas (or cleaning gas) in the reaction space 5 from entering the chamber inner space 10 through the gap G. Accordingly, devices mounted under the chamber 24 such as the driving motor 11 connected to the chamber inner space 10, the alignment apparatus 14, or the like, may be protected from the corrosive reaction gas.

As illustrated in FIG. 3, the ring 8 may be arranged between the upper body 16 and the substrate supporting apparatus 3. For example, the ring 8 may be a gas flow control ring (FCR). The ring 8 may control a pressure balance between the reaction space 5 and the chamber inner space 10 by adjusting a width of a gap between the upper body 16 and the substrate supporting apparatus 3.

FIG. 4 illustrates a substrate processing apparatus according to embodiments of the present disclosure, which includes two or more reactors.

In FIG. 4, the substrate processing apparatus may include the alignment apparatus 14 and the alignment apparatus supporting module 16 at the lower end of the substrate supporting apparatus 3. An example of the alignment apparatus 14 is schematically illustrated in FIG. 5. The alignment apparatus 14 may be used to perform centering of the substrate supporting apparatus 3 with respect to a ring and/or cleaning of the ring 8 and the substrate supporting apparatus 3 by using an X-Y stage. For example, the substrate supporting apparatus 3 may be centered and/or cleaned by moving the substrate supporting apparatus 3 in a +X, −X, +Y, or −Y direction. In addition, the alignment apparatus 14 may be connected to the controller (15 in FIG. 1) and may automatically align the substrate supporting apparatus 3 according to a command from the controller (15 in FIG. 1). According to a modified example, the alignment apparatus 14 may manually align the substrate supporting apparatus 3.

In FIG. 4, the substrate processing apparatus may further include the alignment apparatus supporting module 16 below the alignment apparatus 14. The alignment apparatus supporting module 16 is schematically illustrated in FIG. 6. The alignment apparatus supporting module 16 may include the driving motor (11 in FIG. 1) that vertically moves the substrate supporting apparatus 3.

FIG. 5 schematically illustrates an example of the alignment apparatus 14 of the substrate processing apparatus according to embodiments of the present disclosure. The alignment apparatus 14 may include an insertion portion HH into which the substrate supporting apparatus (3 in FIG. 1) may be inserted. The substrate supporting apparatus (3 in FIG. 1) may be inserted into the insertion portion HH of the alignment apparatus 14 to be fixed. The alignment apparatus 14 may further include a stretchable portion insertion portion BB in which the stretchable portion (12 in FIG. 1) may be mounted. In addition, the alignment apparatus 14 may further include a cooler 2700. The cooler 2700 may prevent heating of the alignment apparatus 14 due to the heated substrate supporting apparatus when the substrate supporting apparatus is inserted into the alignment apparatus 14, and thus may prevent heating of elements such as an x-axis motor Mx, a y-axis motor My or the like in the alignment apparatus 14. The alignment apparatus 14 may further include a stage 500. The stage 500 may be horizontally moved in an x-axis or a y-axis via the x-axis motor Mx and the y-axis motor My.

FIG. 7 is an expanded view of a portion of a reactor of FIG. 1.

FIG. 7 illustrates the substrate supporting apparatus that is lowered to unload a substrate after a series or a plurality of series of processings on one or more substrates are completed, and then is lifted to a substrate processing position again. In the present embodiment, a distance H between the gas supplying portion 2 and the substrate supporting apparatus 3 (that is, a reaction space gap) is 12 mm, which may be equal to a reaction space height during a substrate processing process.

As described above, during a substrate processing process, reaction gases including a source gas are supplied to the reaction space 5 via the gas supplying portion 2, and then may be discharged to the discharge space 7 through a gap formed between the reaction space 5 and the discharge duct 6. However, a gap distance 701 between the substrate supporting apparatus 3 and the ring 8 is narrow, and thus, corresponds to a blind spot where discharging is difficult. Accordingly, reaction gases permeated between the substrate supporting apparatus 3 and the ring 8 during a substrate processing process are not discharged but react with each other, and thus may deposit a thin film layer on lateral surfaces of the substrate supporting apparatus 3 and the ring 8. Film layers deposited on the lateral surfaces of the substrate supporting apparatus 3 and the ring 8 may wear off as they come into friction with each other due to frequent lifting up and lowering of the substrate supporting apparatus 3, and may act as a contaminant in the reaction space.

FIG. 8 is an expanded view of a portion G of FIG. 7 (a gap between the substrate supporting apparatus 3 and the ring 8). FIG. 8 illustrates an example of a layer 25 deposited in a blind spot between the ring 8 and the substrate supporting apparatus 3 during a substrate processing process. In detail, the layer 25 deposited on a lateral surface of the substrate supporting apparatus 3 and an internal lateral surface of the ring 8 is illustrated.

As described above, during a substrate processing process, a filling gas is supplied into the chamber inner space 10 via the second gas supply portion (9 in FIG. 1), and as the filling gas is forming a gas curtain in the gap G between the substrate supporting apparatus 3 and the ring 8, the reaction gas in the reaction space 5 may penetrate into only an upper portion of the gap G, and not into a lower portion of the gap G. Accordingly, as illustrated in FIG. 8, the layer 25 may be deposited only on an upper area of the lateral surface of the substrate supporting apparatus 3 and on an upper area of the internal lateral surface of the ring 8, and no layer is deposited on a lower area of the lateral surface of the substrate supporting apparatus 3 and a lower area of the internal surface of the ring 8.

In general, to remove a contaminant in the blind spot as above, a reactor is disassembled and additional wet cleaning is performed on each component part. However, the cleaning method described above requires time to restore the substrate processing apparatus, and thus, a down time of the apparatus is too long, and accordingly, efficient maintenance is difficult.

Accordingly, the present disclosure provides a method of removing a thin layer deposited on a blind spot (in detail, the upper area of the lateral surface of the substrate supporting apparatus 3 and the upper area of the internal lateral surface of the ring 8) without having to disassemble the substrate processing apparatus.

FIG. 9 schematically illustrates a method of cleaning a substrate processing apparatus according to embodiments of the present disclosure.

Referring to FIG. 9, before performing a method of cleaning the substrate processing apparatus, a series of processings or a plurality of series of processings on one or more substrates may be performed (operation S00). Next, an operation of unloading a substrate as the substrate supporting apparatus (3 in FIG. 1) is lowered may be performed (S01). After unloading a substrate, the substrate supporting apparatus (3 in FIG. 1) may be lifted again to form a reaction space with respect to the upper body.

Next, the method of cleaning a substrate processing apparatus according to the embodiments may include moving the substrate supporting apparatus relative to the ring, and supplying a cleaning gas to an upper space (5 in FIG. 1) of the substrate supporting apparatus 3. By performing these operations, a thin layer deposited on a blind spot (in detail, a lateral surface of the substrate supporting apparatus and an internal lateral surface of the ring) may be removed.

In detail, a first operation (S901) of moving the substrate supporting apparatus in a first direction by a first preset distance may be performed.

In an embodiment, the first direction may be a thickness direction of the substrate supporting apparatus (that is, a direction perpendicular to a ground surface). According to a selective embodiment, the first direction may be a z-axis direction. For example, the substrate supporting apparatus may be moved relative to the ring in the z-axis direction. In this case, the first preset distance may be equal to or less than a thickness of the substrate supporting apparatus. This will be described later with reference to FIGS. 11A and 11B.

In another embodiment, the first direction may be a radius direction of the substrate supporting apparatus (that is, a direction parallel to a ground surface). According to a selective embodiment, the first direction may be a−x-axis direction. For example, the substrate supporting apparatus may be moved relative to the ring in the −x-axis direction. In this case, the first preset distance may be equal to or greater than (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2. This will be described later with reference to FIGS. 13A and 13B. In an embodiment, a length of the inner diameter of the ring and a length of the outer diameter of the substrate supporting apparatus may be input to the controller (15 in FIG. 1) before the first operation (S901) of FIG. 9. The controller (15 in FIG. 1) may calculate a distance that the substrate supporting apparatus has moved, by using the input length of the inner diameter of the ring and the input length of the outer diameter of the substrate supporting apparatus.

By moving the substrate supporting apparatus, a portion of the lateral surface of the substrate supporting apparatus or a portion of the internal lateral surface of the ring may be exposed to a reaction space. By supplying a cleaning gas to the reaction space, an exposed portion of the lateral surface of the substrate supporting apparatus or an exposed portion of the internal lateral surface of the ring may be cleaned. This will be described later with reference to FIGS. 11B, 11C, 13B, and 13C.

Next, a second operation (S903) of moving the substrate supporting apparatus in a second direction by a first preset distance may be performed.

The second direction may be an opposite direction to the first direction. For example, when the first direction is a z-axis direction, the second direction may be a−z-axis direction. In addition, when the first direction is a−x-axis direction, the second direction may be an x-axis direction. As operation S903 is performed, the substrate supporting apparatus may return to a position before operation S901 is performed.

Next, a third operation (S905) of moving the substrate supporting apparatus in the second direction by a second preset distance may be performed.

When the second direction is a−z-axis direction, the second preset distance may be equal to or less than a thickness of the ring. This will be described later with reference to FIGS. 11D and 11E.

When the second direction is an x-axis direction, the second preset distance may be equal to or greater than (the inner diameter of the ring−the outer diameter of the substrate supporting apparatus)/2. This will be described later with reference to FIGS. 13A and 13B.

By moving the substrate supporting apparatus, a portion of a lateral surface of the substrate supporting apparatus or a portion of the internal lateral surface of the ring may be exposed to a reaction space. By supplying a cleaning gas to the reaction space, an exposed portion of the lateral surface of the substrate supporting apparatus or an exposed portion of the internal lateral surface of the ring may be cleaned. This will be described later with reference to FIGS. 11E, 11F, 13E, and 13F.

Next, a fourth operation (S907) of moving the substrate supporting apparatus in the first direction by a second preset distance may be performed.

As operation S907 is performed, the substrate supporting apparatus may return to a position before the cleaning method is performed.

According to the method of cleaning the substrate processing apparatus of the present embodiment, a cleaning gas may be continuously supplied (S900) to an upper space (5 of FIG. 1)) of the substrate supporting apparatus during the first operation (S901) through the fourth operation (S907). In this case, in the method of cleaning a substrate processing apparatus, cleaning of a reactor and cleaning of blind spots in the reactor may be simultaneously performed.

However, as illustrated in FIG. 10, according to another embodiment, the cleaning gas may be supplied (S901 a) between the first operation (S901) and the second operation (S903), and supplied (S905 a) between the third operation (S905) and the fourth operation (S907). In addition, the cleaning gas may be further supplied (S01 a) before the first operation (S901). In this case, in the method of cleaning a substrate processing apparatus, cleaning of a reactor may be performed first, and then cleaning of blind spots may be performed subsequently. According to an embodiment, a supplying period of operations of supplying a cleaning gas (S901 a and S905 a) between the first operation (S901) and the second operation (S903) and between the third operation (S905) and the fourth operation (S907) may be shorter than a supplying period of operation (S01 a) of supplying a cleaning gas before the first operation (S901). For example, a supplying period of a cleaning gas before the first operation (S901) may be about six minutes, and a supplying period between the first operation (S901) and the second operation (S903) and between the third operation (S905) and the fourth operation (S907) may be about two minutes.

The cleaning method of FIGS. 9 and 10 may be performed periodically. For example, the period may be several hours, days, weeks, months or years. According to another embodiment, the cleaning method may be performed every time when a series of processings or a plurality of series of processings on one or more substrates are completed.

An object to which the method of cleaning the substrate processing apparatus is applied is not limited to one reactor processing one substrate. In some embodiments, a cleaning method may be used in a batch reactor (for example, the substrate processing apparatus of FIG. 2) that processes a plurality of substrates each time, that is, a batch of substrates. In this case, the cleaning method may be performed on each reactor simultaneously or at different times.

FIGS. 11A through 11E illustrate a process of cleaning the substrate processing apparatus of FIG. 1 by using the cleaning method of FIG. 10. For convenience of description, according to the present embodiment, the first direction may be a thickness direction of the substrate supporting apparatus (a z-axis direction in the drawings), and the second direction is set as a−z-axis direction.

FIG. 11A illustrates the substrate supporting apparatus that is lowered to unload a substrate (operation S01 of FIG. 10) after a series of processings or a plurality of series of processings on one or more substrates are completed (operation S00 of FIG. 10), and then is lifted to a substrate processing position again. In the present embodiment, a distance H between the gas supplying portion 2 and the substrate supporting apparatus 3 (that is, a reaction space gap) is 12 mm, which may be equal to a reaction space height during a substrate processing process. A thin layer deposited during a substrate processing process exists on a lateral surface of the substrate processing apparatus and an internal lateral surface of the ring.

According to operation S01 a of FIG. 10, a cleaning gas (for example, NF₃) may be supplied to the reaction space 5 via the gas supplying portion 2, and the reactor may be dry-cleaned accordingly. Operation S01 a may be performed during a first period. For example, the first period may be about six minutes.

Next, referring to FIGS. 10 and 11B, operation S901 of FIG. 10 may be performed, and the substrate supporting apparatus 3 may be moved in the first direction (z-axis direction) by the first preset distance. The driving motor 11 (FIG. 1) that moves the substrate supporting apparatus 3 vertically may be used to lift the substrate supporting apparatus 3. In order that a lower portion of the substrate supporting apparatus 3 is not exposed to the reaction space 5, the first preset distance may be equal to or less than a thickness of the substrate supporting apparatus 3. In an embodiment, the first preset distance may be 7 mm, and a distance H′ between the gas supplying portion 2 and the substrate supporting apparatus 3 may be 12 mm−7 mm=5 mm. That is, a distance between the gas supplying portion 2 and the substrate supporting apparatus 3 is less than the distance during a substrate processing process.

As illustrated in FIG. 11B, as the substrate supporting apparatus 3 is lifted via operation S901 of FIG. 10, a portion SH of the lateral surface of the substrate supporting apparatus 3 is exposed to the reaction space 5.

Next, referring to FIGS. 10 and 11C, operation S901 a of FIG. 10 is performed, and a cleaning gas may be supplied to the reaction space 5. Here, the lateral surface SH of the substrate supporting apparatus 3 exposed to the reaction space 5 may be cleaned. That is, a thin layer deposited on the lateral surface SH of the substrate supporting apparatus 3 may be removed. Operation S901 a may be performed during a second period. For example, the second period may be about two minutes.

In order to prevent a cleaning gas in the reaction space 5 from entering the chamber inner space 10 through the gap G, the cleaning method may further include supplying a gas to the lower space 10 of the substrate supporting apparatus 3 during operation (S901 a) of supplying a cleaning gas to the upper space 5 of the substrate supporting apparatus 3. According to the present embodiment, a filling gas may be supplied to the lower space 10 through the second gas inlet portion 9 (FIG. 1). The filling gas may form a gas curtain in the gap G between the substrate supporting apparatus 3 and the ring 8, thereby preventing a cleaning gas from entering the chamber inner space 10 through the gap G. The filling gas may be, for example, an inert gas such as N₂ or Ar.

Next, referring to FIGS. 10 and 11D, operation S903 of FIG. 10 may be performed, and the substrate supporting apparatus 3 may be moved in the second direction (−z-axis direction) by the first preset distance. As operation S903 is performed, the substrate supporting apparatus 3 may return to a position before operation S901 is performed. Thus, a distance H between the gas supplying portion 2 and the substrate supporting apparatus 3 is 12 mm.

Next, referring to FIGS. 10 and 11E, operation S905 of FIG. 10 may be performed, and the substrate supporting apparatus 3 may be moved in the second direction (−z-axis direction) by the second preset distance. The driving motor 11 (FIG. 1) that moves the substrate supporting apparatus 3 vertically may be used to lower the substrate supporting apparatus 3. In order that a lower portion of the ring 8 is not exposed to the reaction space 5, the second preset distance may be equal to or less than a thickness of the ring 8. In an embodiment, the second preset distance may be 7 mm, and a distance H″ between the gas supplying portion 2 and the substrate supporting apparatus 3 may be 12 mm+7 mm=19 mm. That is, a distance between the gas supplying portion 2 and the substrate supporting apparatus 3 became wider than at the time of a substrate processing process.

As illustrated in FIG. 11E, as the substrate supporting apparatus 3 is lowered via operation S905 of FIG. 10, a portion SF of the internal lateral surface of the ring 8 is exposed to the reaction space 5.

Next, referring to FIGS. 10 and 11F, operation S905 a of FIG. 10 is performed, and a cleaning gas may be supplied to the reaction space 5. Here, the portion of the internal lateral surface SF of the ring 8 exposed to the reaction space 5 may be cleaned. That is, a thin layer deposited on the internal lateral surface SF of the ring 8 may be removed. Operation S905 a may be performed during a third period. For example, the third period may be about two minutes.

As described above, in order to prevent a cleaning gas in the reaction space 5 from entering the chamber inner space 10 through the gap G, the cleaning method may further include supplying a gas to the lower space 10 of the substrate supporting apparatus during operation (S905 a) of supplying a cleaning gas to the upper space 5 of the substrate supporting apparatus. According to the present embodiment, a filling gas may be supplied to the lower space 10 through the second gas inlet portion (9 in FIG. 1).

Next, referring to FIGS. 10 and 11G, operation S907 of FIG. 10 may be performed, and the substrate supporting apparatus 3 may be moved in the first direction (z-axis direction) by the second preset distance. As operation S907 is performed, the substrate supporting apparatus 3 may return to a position before operation S901 is performed. Thus, a distance H between the gas supplying portion 2 and the substrate supporting apparatus 3 is 12 mm.

As described above, simply by lifting and lowering the substrate supporting apparatus 3, a thin layer deposited on an upper portion of the lateral surface of the substrate supporting apparatus 3 and an upper portion of the internal lateral surface of the ring 8 may be removed. As described above, according to the present disclosure, without disassembling the substrate processing apparatus, contaminants in the blind spots may be removed.

Next, a method of cleaning a lateral surface of the substrate supporting apparatus and an internal lateral surface of the ring via horizontal movement of the substrate processing apparatus, instead of by vertically lifting or lowering the substrate processing apparatus, will be described.

FIG. 12 schematically illustrates a method of cleaning a substrate processing apparatus according to other embodiments of the present disclosure.

Operations S00 through S907 of the method of cleaning a substrate processing apparatus of FIG. 12 are respectively identical to operations S00 through S907 of the method of cleaning a substrate processing apparatus of FIG. 10. Hereinafter, repeated description among the embodiments will be omitted.

The method of cleaning a substrate processing apparatus of FIG. 12 may further include a fifth operation (S909) of moving the substrate supporting apparatus in a third direction by a third preset distance.

The third direction may be a radius direction of the substrate supporting apparatus. That is, the third direction may be a direction that is horizontal to a ground surface. In addition, the third direction may be perpendicular to a first direction and a second direction. According to a selective embodiment, the third direction may be a y-axis direction. For example, the substrate supporting apparatus may be moved in the y-axis direction.

In this case, the third preset distance may be equal to or greater than (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2.

By moving the substrate supporting apparatus, a portion of a lateral surface of the substrate supporting apparatus or a portion of an internal lateral surface of the ring may be exposed to a reaction space in a horizontal direction.

Next, a cleaning gas may be supplied to clean an exposed portion of the lateral surface of the substrate supporting apparatus or an exposed portion of the internal lateral surface of the ring (S909 a).

Next, a sixth operation (S911) of moving the substrate supporting apparatus in a fourth direction by the third preset distance may be performed.

The fourth direction may be an opposite direction to the third direction. For example, when the third direction is a y-axis direction, the fourth direction may be a−y-axis direction. In addition, the fourth direction may be perpendicular to the first direction and the second direction. As operation S911 is performed, the substrate supporting apparatus may return to a position before operation S901 is performed.

Next, a seventh operation (S913) of moving the substrate supporting apparatus in the fourth direction by a fourth preset distance may be performed.

When the fourth direction is a −y-axis direction, the fourth preset distance may be equal to or greater than (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2.

By moving the substrate supporting apparatus, a portion of the lateral surface of the substrate supporting apparatus or a portion of the internal lateral surface of the ring may be exposed to a reaction space.

Next, a cleaning gas may be supplied to clean an exposed portion of the lateral surface of the substrate supporting apparatus or an exposed portion of the internal lateral surface of the ring (S913 a).

Next, a fourth operation (S915) of moving the substrate supporting apparatus in the third direction by the fourth preset distance may be performed.

As operation S915 is performed, the substrate supporting apparatus may return to a position before the cleaning method is performed.

According to the method of cleaning a substrate processing apparatus of the present embodiment, a cleaning gas may be supplied between the first operation (S901) and the second operation (S903), and between the third operation (S905) and the fourth operation (S907), between the fifth operation (S909) and the sixth operation (S911), and between the seventh operation (S913) and the eighth operation (S915). In addition, the cleaning gas may be further supplied (S01 a) before the first operation (S901).

However, according to another embodiment, a cleaning gas may be continuously supplied to the upper space (5 in FIG. 1) of the substrate supporting apparatus during the first operation (S901) through the eighth operation (S915). In this case, in the method of cleaning a substrate processing apparatus, cleaning of a reactor and cleaning of blind spots in the reactor may be simultaneously performed.

The cleaning method of FIG. 12 may be performed periodically. For example, the period may be several hours, days, weeks, months or years. According to another embodiment, the cleaning method may be performed every time when a series of processings or a plurality of series of processings on one or more substrates are completed.

An object to which the method of cleaning the substrate processing apparatus is applied is not limited to one reactor processing one substrate. In some embodiments, the cleaning method may be used in a batch reactor (for example, the substrate processing apparatus of FIG. 2) that processes a plurality of substrates each time, that is, a batch of substrates. In this case, the cleaning method may be performed on each reactor simultaneously or at different times.

In addition, when the first through fourth preset distances are (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2, as will be described with reference to FIGS. 15 through 17, centering (e.g. alignment) of the substrate supporting apparatus and cleaning of the blind spots may be performed simultaneously.

FIGS. 13A through 13G illustrate a process of cleaning the substrate processing apparatus of FIG. 1 by using the cleaning method of FIG. 10.

For convenience of description, hereinafter, it will be assumed that the first direction is a−x-axis direction (a direction to the left in the drawing), the second direction is an x-axis direction (a direction to the right in the drawing), the third direction is a y-axis direction (a direction passing through into the drawing), and the fourth direction is a −y-axis direction (a direction passing through and coming out from the drawing), and the first preset distance and the second preset distance are (inner diameter D of the ring−outer diameter C of the substrate supporting apparatus)/2.

First, FIG. 13A illustrates the substrate supporting apparatus that is lowered to unload a substrate (operation S01 of FIG. 12) after a series of processings or a plurality of series of processings on one or more substrates are completed (operation S00 of FIG. 12), and then is lifted to a substrate processing position again. In the present embodiment, a distance H between the gas supplying portion 2 and the substrate supporting apparatus 3 (that is, a reaction space gap) is 12 mm, which may be equal to a reaction space height during a substrate processing process. A thin layer deposited during a substrate processing process exists on a lateral surface of the substrate processing apparatus and an internal lateral surface of the ring.

According to operation S01 a of FIG. 12, a cleaning gas (for example, NF₃) may be supplied to the reactor via the gas supplying portion 2, and the reactor may be dry-cleaned accordingly. Operation S01 a may be performed during a first period. For example, the first period may be about six minutes.

Next, referring to FIGS. 12 and 13B, operation S901 of FIG. 12 may be performed, and the substrate supporting apparatus 3 may be moved in the first direction (−x-axis direction) by the first preset distance. To move the substrate supporting apparatus 3 in the −x-axis direction, the alignment apparatus (14 in FIG. 1) and the controller (15 in FIG. 1) that move the substrate supporting apparatus in a x-y-axis direction may be used. In order to maximize a distance between a lateral surface of the substrate supporting apparatus in an x-axis direction and the ring 8, the lateral surface of the substrate supporting apparatus in a −x-axis direction and the ring 8 may be brought into contact with each other. Thus, in order to bring the substrate supporting apparatus 3 and the ring 8 into contact with each other, the first preset distance may be equal to or greater than (the inner diameter D of the ring−the outer diameter C of the substrate supporting apparatus)/2. According to the present embodiment, the first preset distance may be (inner diameter of the ring−the outer diameter of the substrate supporting apparatus)/2.

As illustrated in FIG. 13B, as the substrate supporting apparatus 3 is moved in a −x-axis direction via operation S901 of FIG. 12, a lateral surface of the substrate supporting apparatus 3 in the x-axis direction and an internal lateral surface of the ring 8 facing the lateral surface of the substrate supporting apparatus 3 may be exposed to the reaction space 5. That is, a layer 25 b may be exposed in the reaction space 5.

Next, referring to FIGS. 12 and 13C, operation S901 a of FIG. 12 is performed, and a cleaning gas may be supplied to the reaction space 5. Here, the lateral surface of the substrate supporting apparatus and the internal lateral surface of the ring 8 that are exposed to the reaction space 5 may be cleaned. That is, the layer 25 b deposited on the lateral surface of the substrate supporting apparatus and the internal lateral surface of the ring may be removed (250 b). Operation S901 a may be performed during a second period. For example, the second period may be about two minutes.

In order to prevent a cleaning gas in the reaction space 5 from entering the chamber inner space 10 through the gap G, the cleaning method may further include supplying a gas to the lower space 10 of the substrate supporting apparatus 3 during operation S901 a of supplying a cleaning gas to the upper space 5 of the substrate supporting apparatus. According to the present embodiment, a filling gas may be supplied to the lower space 10 through the second gas inlet portion (9 in FIG. 1). The filling gas may form a gas curtain in the gap G between the substrate supporting apparatus 3 and the ring 8, thereby preventing a cleaning gas from entering the chamber inner space 10 through the gap G. The filling gas may be, for example, an inert gas such as N₂ or Ar.

Next, referring to FIGS. 12 and 13D, operation S903 of FIG. 12 may be performed, and the substrate supporting apparatus 3 may be moved in the second direction (x-axis direction) by the first preset distance. As operation S903 is performed, the substrate supporting apparatus 3 may return to a position before operation S901 is performed.

Next, referring to FIGS. 12 and 13E, operation S905 of FIG. 12 may be performed, and the substrate supporting apparatus 3 may be moved in the second direction (x-axis direction) by the second preset distance. To move the substrate supporting apparatus 3 in the x-axis direction, the alignment apparatus 14 (FIG. 1) and the controller 15 (FIG. 1) that move the substrate supporting apparatus 3 in a x-y-axis direction may be used. In order to maximize a distance between a lateral surface of the substrate supporting apparatus 3 in an −x-axis direction and the ring 8, the lateral surface of the substrate supporting apparatus 3 in an x-axis direction and the ring 8 is to be brought into contact with each other. Thus, in order to bring the substrate supporting apparatus 3 and the ring 8 into contact with each other, the second preset distance may be equal to or greater than (the inner diameter D of the ring−the outer diameter C of the substrate supporting apparatus)/2. According to the present embodiment, the second preset distance may be (the inner diameter D of the ring−the outer diameter C of the substrate supporting apparatus)/2.

As illustrated in FIG. 13E, as the substrate supporting apparatus 3 is moved in the x-axis direction via operation S905 of FIG. 12, a lateral surface of the substrate supporting apparatus 3 in the −x-axis direction and an internal lateral surface of the ring 8 facing the lateral surface of the substrate supporting apparatus 3 may be exposed to the reaction space 5. That is, a thin layer 25 a may be exposed in the reaction space (5 in FIG. 1).

Next, referring to FIGS. 12 and 13F, operation S905 a of FIG. 12 is performed, and a cleaning gas may be supplied to the reaction space 5. Here, the lateral surface of the substrate supporting apparatus and the internal lateral surface of the ring that are exposed to the reaction space 5 may be cleaned. That is, the layer 25 a deposited on the lateral surface of the substrate supporting apparatus and the internal lateral surface of the ring may be removed (250 a). Operation S905 a may be performed during a third period. For example, the third period may be about two minutes.

As described above, in order to prevent a cleaning gas in the reaction space 5 from entering the chamber inner space 10 through the gap G, the cleaning method may further include supplying a gas to the lower space 10 of the substrate supporting apparatus during operation (S905 a) of supplying a cleaning gas to the upper space 5 of the substrate supporting apparatus. According to the present embodiment, a filling gas may be supplied to the lower space 10 through the second gas inlet portion (9 in FIG. 1).

Next, referring to FIGS. 12 and 13G, operation S907 of FIG. 12 may be performed, and the substrate supporting apparatus 3 may be moved in the first direction (−x-axis direction) by the second preset distance. As operation S907 is performed, the substrate supporting apparatus may return to a position before operation S901 is performed.

FIGS. 13A through 13G illustrate a process of cleaning the substrate supporting apparatus 3 by moving the substrate supporting apparatus 3 on an x-axis by performing operation S901 through operation S907 of FIG. 12. Similarly, by performing operation S909 through S915 of FIG. 12 on a y-axis and a−y-axis, the substrate supporting apparatus 3 may be cleaned as the substrate supporting apparatus 3 is moved on the y-axis and a−y-axis.

FIG. 14 illustrates a process of cleaning a gap between the substrate supporting apparatus and the ring by using the cleaning method of FIG. 12 viewed from above the substrate supporting apparatus.

In the present embodiment, the first direction is a −x-axis direction (a direction to the left in the drawing), the second direction is an x-axis direction (a direction to the right in the drawing), the third direction is a y-axis direction (an upward direction in the drawing), and the fourth direction is a−y-axis direction (a downward direction in the drawing), and the first preset distance through the fourth preset distance are (inner diameter D of the ring−outer diameter C of the substrate supporting apparatus)/2.

(a) and (b) of FIG. 14 illustrate a process of cleaning a thin layer deposited on a lateral surface of the substrate supporting apparatus and an internal lateral surface of the ring by moving the substrate supporting apparatus on an −x-axis and an x-axis by performing operations S901 through S907 of FIG. 12. Next, (c) and (d) of FIG. 14 illustrate a process of cleaning a thin layer deposited on a lateral surface of the substrate supporting apparatus and an internal lateral surface of the ring by moving the substrate supporting apparatus on a y-axis and a−y-axis by performing operations S909 through S915 of FIG. 12. By doing these, the lateral surface of the substrate supporting apparatus and the internal lateral surface of the ring may be cleaned completely.

In detail, according to operation S901 of FIG. 12, the alignment apparatus may move the substrate supporting apparatus to the left, bringing the substrate supporting apparatus to a lateral surface of the ring ((a) of FIG. 14). As a result, a distance dA between the lateral surface of the substrate supporting apparatus in the x-axis direction and the ring is increased. Due to the increased distance, a cleaning gas supplied to the reaction gas during operation S901 a may easily enter an area XA, thereby cleaning contaminants remaining in the area XA (a solid line of (a) of FIG. 14).

Next, according to operation S903 and operation S905 of FIG. 12, the alignment apparatus may move the substrate supporting apparatus to the right, bringing the substrate supporting apparatus to a lateral surface of the ring ((b) of FIG. 14). As a result, a distance dB between a lateral surface of the substrate supporting apparatus in the −x-axis direction and the ring is increased. Due to the increased distance, a cleaning gas supplied to the reaction space during operation S905 a may easily enter an area XB, thereby cleaning contaminants remaining in the area XB (a solid line of (b) of FIG. 14).

Next, according to operation S907 and operation S909 of FIG. 12, the alignment apparatus may move the substrate supporting apparatus in a y-axis direction, bringing the substrate supporting apparatus into contact with a surface of the ring ((c) of FIG. 14). As a result, a distance dc between a lateral surface of the substrate supporting apparatus in the −y-axis direction and the ring is increased. Due to the increased distance, a cleaning gas supplied to the reaction space during operation S909 a may easily enter an area Xc, thereby cleaning contaminants remaining in the area Xc (a solid line of (c) of FIG. 14).

Finally, according to operation S911 and operation S913 of FIG. 12, the alignment apparatus may move the substrate supporting apparatus in a−y-axis direction, bringing the substrate supporting apparatus into contact with a surface of the ring ((d) of FIG. 14). As a result, a distance dD between a lateral surface of the substrate supporting apparatus in the y-axis direction and the ring is increased. Due to the increased distance, a cleaning gas supplied to the reaction space during operation S913 a may easily enter an area XD, thereby cleaning contaminants remaining in the area XD (a solid line of (d) of FIG. 14).

As described above, simply by moving the substrate supporting apparatus on an xy-axis, a thin layer deposited on an upper portion of the lateral surface of the substrate supporting apparatus 3 and an upper portion of the internal lateral surface of the ring 8 may be removed. As described above, according to the present disclosure, without disassembling the substrate processing apparatus, contaminants in the blind spots may be removed.

FIG. 15 schematically illustrates a substrate processing apparatus according to other embodiments of the present disclosure.

As illustrated in FIG. 15, the ring 8 may be arranged between the upper body 16 and the substrate supporting apparatus 3. For example, the ring 8 may be a gas flow control ring (FCR). The ring 8 may control a pressure balance between the reaction space 5 and the chamber inner space 10 by adjusting a width of a gap between the upper body 16 and the substrate supporting apparatus 3.

However, unlike the substrate processing apparatus of FIG. 1, the ring 8 illustrated in FIG. 15 may be mounted on the upper body 16 to be slid or floated relative to the upper body 16. For example, when a pushing force is applied to the ring 8, the ring 8 may be moved in a direction of a force applied onto the upper body 16 by that pushing force.

In detail, a step portion S facing the reaction space may be included in a lower inner portion of the upper body 16. In this case, the ring 8 may be mounted on an inner portion of the step portion S. When the ring 8 is mounted on the step portion S of the upper body 16, a wall of the step portion S and an outer wall of the ring 8 may be spaced apart by a certain distance (e). According to another embodiment, the step portion S may further include a pad P, and the ring 8 may be mounted on the pad P such that the ring 8 is slidable relative to the pad P. The ring 8 may be installed in the step portion S and be movable horizontally via a pushing force of the substrate supporting apparatus 3. For example, as will be described later, a surface of the ring 8 may be in contact with the substrate supporting apparatus 3 via movement of the substrate supporting apparatus 3, and may move in a movement direction of the substrate supporting apparatus 3 while maintaining a contact state with the substrate supporting apparatus 3.

According to another embodiment, the ring 8 may be fixed with respect to the upper body 16.

As described above, by adjusting a width of a gap between the upper body 16 and the substrate supporting apparatus 3, that is, by adjusting a width of the gap between the ring 8 and the substrate supporting apparatus 3, the ring 8 may be used to control a width of a filling gas and a process gas around the gap, and accordingly, a pressure of the filling gas and the process gas may be controlled.

However, in a high temperature process, due to a difference in thermal expansion caused by a temperature difference in portions of the chamber and the reactor, mismatch, that is, misalignment of the portions of the reactor occurs. For example, in a high-temperature process, due to a difference in thermal expansion of an upper wall and a lower wall of a chamber, and a difference in thermal expansion in upper and lower portions of the reactor, misalignment in components of the reactor occurs, and accordingly, a centering position of the substrate supporting apparatus 3 relative to the ring 8 may be deviated (U.S. Ser. No. 16/655,217 and U.S. Ser. No. 16/601,593). That is, a gap width may not be uniform over an entire section. When a gap between the substrate supporting apparatus 3 and the ring 8 is not uniform (A1≠B1), a pressure balance of a filling gas and a reaction gas in a gap area surrounding edge portions of the substrate supporting apparatus may vary according to a position of the gap. In this case, a gas flow around the substrate may not be uniform during deposition and discharging, and thus, a uniformity of a thin film on the substrate, particularly, thin film uniformity in an edge portion of the substrate, may not be uniform or may be deteriorated. Accordingly, a failure rate of a semiconductor device may be increased, and process reproducibility and reliability among reactors may be degraded.

Thus, a method of correcting movement of a center of the substrate supporting apparatus according to use of the substrate processing apparatus at a high temperature and maintaining a uniform width of a gap between the substrate supporting apparatus 3 and the ring 8 is needed. Examples of the centering method of the substrate supporting apparatus 3 are disclosed in detail in U.S. Ser. No. 16/655,217 and U.S. Ser. No. 16/601,593.

FIG. 15 illustrates an example in which the substrate supporting apparatus 3 is deviated relative to the ring 8 after a substrate processing process (here, A1<(D−C)/2<B1).

In the present embodiment, a length of the pad P is g, and a thickness of the ring 8 in a radius direction is f. Preferably, when the ring 8 is moved, in order for the ring 8 to be completely mounted on the pad P, the length g of the pad P is greater than or equal to the thickness f of the ring 8 in the radius direction. A distance from an outer wall of the ring 8 to the step portion S is (e), and may vary according to movement of the ring 8.

A length of an inner diameter of the ring 8 is D, and a length of an outer diameter of the substrate supporting apparatus 3 is C. The length D of the inner diameter of the ring 8 and the length C of the outer diameter of the substrate supporting apparatus 3 are constants. The length D of the inner diameter of the ring 8 and the length C of the outer diameter of the substrate supporting apparatus 3 may be input to the controller 15 before operation S1601 of FIG. 16. The controller 15 may calculate a distance the substrate supporting apparatus 3 has moved, by using the input length D of the inner diameter of the ring 8 and the input length C of the outer diameter of the substrate supporting apparatus 3. As described above, according to the present disclosure, without installing an additional instrument for measuring a distance between the substrate supporting apparatus 3 and the ring 8, a centering operation of the substrate supporting apparatus 3 may be performed just based on the length D of the inner diameter of the ring 8 and the length C of the outer diameter of the substrate supporting apparatus 3.

In addition, FIG. 15 illustrates an example in which a thin layer is deposited between the substrate supporting apparatus 3 and the ring 8.

As described above, a gap distance between the substrate supporting apparatus 3 and the ring 8 is narrow, and thus, corresponds to a blind spot where discharging is difficult. In FIG. 15, a thin layer 25 a is deposited on a lateral surface of the substrate supporting apparatus 3 in an −x-axis direction and on an upper portion of an internal lateral surface of the ring 8 facing the lateral surface of the substrate supporting apparatus 3, and also, a thin layer 25 b is deposited on a lateral surface of the substrate supporting apparatus 3 in an x-axis direction and an internal lateral surface of the ring 8 facing the substrate supporting apparatus 3.

When deviation of centering of the substrate supporting apparatus is repaired and cleaning of blind spots is additionally performed after the substrate processing process, a down time of the substrate processing apparatus will be longer, and efficient repair and maintenance is difficult. According to a substrate processing method of the present disclosure as below, while repairing deviation of centering of the substrate supporting apparatus, blind spots may be cleaned at the same time, and thus, the down time may be shortened.

FIG. 16 schematically illustrates a substrate processing method according to other embodiments of the present disclosure.

The substrate processing method of FIG. 16 is a modified example of a method of cleaning the substrate processing apparatus of FIG. 12. Hereinafter, repeated description among the embodiments will be omitted.

After unloading a substrate (S01), a first operation of moving the substrate supporting apparatus in a first direction by a first preset distance may be performed (S1601).

The first direction may be a radius direction of the substrate supporting apparatus (that is, a direction parallel to a ground surface). According to a selective embodiment, the first direction may be a −x-axis direction. For example, the substrate supporting apparatus may be moved relative to the ring in the −x-axis direction. In this case, the first preset distance may be equal to or greater than (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2. Alternatively, the first preset distance may be equal to or less than (the inner diameter of the ring−the outer diameter of the substrate supporting apparatus).

In operation S1601, while the substrate supporting apparatus is moved, the substrate supporting apparatus may be in contact with or not in contact with the ring. When the substrate supporting apparatus is in contact with the ring, if the substrate supporting apparatus is moved continuously even after the substrate supporting apparatus and the ring are in contact with each other, the ring may be moved in the first direction due to a pushing force of the substrate supporting apparatus. This will be described later with reference to FIG. 17A. When the substrate supporting apparatus is not in contact with the ring, no pushing force will be exerted on the ring, and thus, the ring will not be moved.

By moving the substrate supporting apparatus in the first direction in operation S1601 of FIG. 16, a portion of a lateral surface of the substrate supporting apparatus and a portion of an internal lateral surface of the ring may be exposed to a reaction space. Next, a cleaning gas supplied to the reaction space may clean an exposed portion of the lateral surface of the substrate supporting apparatus and/or an exposed portion of the internal lateral surface of the ring.

Next, a second operation of moving the substrate supporting apparatus in a second direction by a second preset distance may be performed (S1603).

The second direction may be an opposite direction to the first direction. For example, when the first direction is a −x-axis direction, the second direction may be an x-axis direction.

The second preset distance may be (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2. As will be described later, as the second preset distance has the above value, the substrate supporting apparatus may be centered with respect to the ring.

Next, a third operation of moving the substrate supporting apparatus in the second direction by the first preset distance may be performed (S1605).

In operation S1605, while the substrate supporting apparatus is moved, the substrate supporting apparatus may be in contact with the ring. When the substrate supporting apparatus is moved continuously even after the substrate supporting apparatus and the ring are in contact with each other, the ring may be moved in the second direction due to a pushing force of the substrate supporting apparatus.

By moving the substrate supporting apparatus in the second direction in operation S1605 of FIG. 16, a portion of a lateral surface of the substrate supporting apparatus and a portion of an internal lateral surface of the ring may be exposed to the reaction space. Next, a cleaning gas supplied to the reaction space may clean an exposed portion of the lateral surface of the substrate supporting apparatus and/or an exposed portion of the internal lateral surface of the ring.

Next, a fourth operation of moving the substrate supporting apparatus in the first direction by the second preset distance may be performed (S1607).

It is to be noted that when the second direction is opposite to the first direction, after operations S1601 through S1607 are performed, a final position of the substrate supporting apparatus is identical to an initial position of the substrate supporting apparatus. This is because during operations S1601 through S1607, the substrate supporting apparatus are moved by the first preset distance in a first direction and a negative first direction, and also, by the second preset distance in the first direction and the negative first direction. Nevertheless, through operations S1601 through operation S1607, in the first direction, the substrate supporting apparatus may be centered with respect to the ring. This is because during operation S1601 and/or operation S1605, a position of the ring is varied by the substrate supporting apparatus. That is, according to the present disclosure, instead of correcting a position of the substrate supporting apparatus, a position of the ring is corrected to center the substrate supporting apparatus with respect to the ring. This will be described later with reference to FIGS. 17A and 17F.

Next, a fifth operation of moving the substrate supporting apparatus in a third direction by the first preset distance may be performed (S1609).

The third direction may be a direction horizontal to a ground surface. In addition, the third direction may be perpendicular to the first direction and the second direction. According to an alternative embodiment, the third direction may be a y-axis direction. For example, the substrate supporting apparatus may be moved relative to the ring in the y-axis direction.

In operation S1609, while the substrate supporting apparatus is moved, the substrate supporting apparatus may be in contact with or not in contact with the ring. When the substrate supporting apparatus is in contact with the ring, if the substrate supporting apparatus is moved continuously even after the substrate supporting apparatus and the ring are in contact with each other, the ring may be moved in the third direction due to a pushing force of the substrate supporting apparatus.

In addition, by moving the substrate supporting apparatus in the third direction in operation S1609 of FIG. 16, a portion of a lateral surface of the substrate supporting apparatus and a portion of the internal lateral surface of the ring may be exposed to the reaction space. Next, a cleaning gas supplied to the reaction space may clean an exposed portion of the lateral surface of the substrate supporting apparatus and/or an exposed portion of the internal lateral surface of the ring.

Next, a sixth operation of moving the substrate supporting apparatus in a fourth direction by the second preset distance may be performed (S1611).

The fourth direction may be perpendicular to the first direction and the second direction. In addition, the fourth direction may be an opposite direction to the third direction. For example, when the third direction is a y-axis direction, the fourth direction may be a−y-axis direction.

Next, a seventh operation of moving the substrate supporting apparatus in the fourth direction by the first preset distance (operation S1613), and an eighth operation of moving the substrate supporting apparatus in the third direction by the second preset distance (operation S1615) may be performed.

In operation S1613, while the substrate supporting apparatus is moved, the substrate supporting apparatus may be in contact with or not in contact with the ring. When the substrate supporting apparatus is in contact with the ring, if the substrate supporting apparatus is moved continuously even after the substrate supporting apparatus and the ring are in contact with each other, the ring may be moved in the fourth direction due to a pushing force of the substrate supporting apparatus.

In addition, by moving the substrate supporting apparatus in the fourth direction in operation S1613 of FIG. 16, a portion of the lateral surface of the substrate supporting apparatus and a portion of the internal lateral surface of the ring may be exposed to the reaction space. Next, a cleaning gas supplied to the reaction space may clean an exposed portion of the lateral surface of the substrate supporting apparatus and/or an exposed portion of the internal lateral surface of the ring.

In the same context as operation S1601 through operation S1607, when the fourth direction is opposite to the third direction, after operation S1609 through operation S1615 are performed, a final position of the substrate supporting apparatus is identical to an initial position of the substrate supporting apparatus. Nevertheless, through operation S1609 through operation S1615, the substrate supporting apparatus may be centered with respect to the ring in the third direction. This is because during operation S1609 and/or operation S1613, the ring is moved by the substrate supporting apparatus in the third direction or the fourth direction.

According to the substrate processing method of the present embodiment, a cleaning gas may be continuously supplied (S1600) to an upper space (5 in FIG. 1) of the substrate supporting apparatus during the first operation (S1601) through the eighth operation (S1615). However, according to another embodiment, a cleaning gas may be supplied between the first operation (S1601) and the second operation (S1603), and between the third operation (S1605) and the fourth operation (S1607), between the fifth operation (S1609) and the sixth operation (S1611), and between the seventh operation (S1613) and the eighth operation (S1615).

FIGS. 17A through 17F schematically illustrate a method of cleaning thin layers 25 a and 25 b deposited between the substrate supporting apparatus 3 and the ring 8 while simultaneously centering the substrate supporting apparatus 3 of FIG. 15 with respect to the ring 8 by using the substrate processing method of FIG. 16. However, it will be obvious to one of ordinary skill in the art to derive that the same result may be obtained by using the cleaning method of FIG. 12 instead of the substrate processing method of FIG. 16 (for example, when using the cleaning method of FIG. 12, if the first preset distance through the fourth preset distance are (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2).

For convenience of description, hereinafter, it will be assumed that the first direction is a −x-axis direction (a direction to the left in the drawing), the second direction is an x-axis direction (a direction to the right in the drawing), the third direction is a y-axis direction (a direction passing through into the drawing), and the fourth direction is a −y-axis direction (a direction passing through and coming out of the drawing), and the first preset distance and the second preset distance are (inner diameter D of the ring−outer diameter C of the substrate supporting apparatus)/2.

First, referring to FIGS. 16 and 17A, according to operation S1601 of FIG. 16, by using the controller 15 and the alignment apparatus 14, the substrate supporting apparatus 3 may be moved in the first direction (−x-axis direction) by the first preset distance (the inner diameter D of the ring−the outer diameter C of the substrate supporting apparatus)/2).

In the present embodiment, since A1<(D −C)/2, during operation S1601, after moving by A1, the substrate supporting apparatus 3 is in contact with the ring 8, and may be further moved by the rest of the distance ((D−C)/2−A1) while maintaining a contact state with the ring 8. Accordingly, while maintaining the contact state with the substrate supporting apparatus 3, the ring 8 may be moved along a movement direction of the substrate supporting apparatus (that is, −x-axis direction) by ((D −C)/2−A1)).

Accordingly, on the left side, a distance between an outer wall of the ring 8 to the step portion S is e −((D −C)/2−A1). In response to this, on the right side, a distance between the outer wall of the ring 8 to the step portion S is e+(D −C)/2−A1.

In addition, on the left side, a gap distance between the substrate supporting apparatus 3 and the ring 8 is 0, and on the right side, a gap distance between the substrate supporting apparatus 3 and the ring 8 is then (D −C).

As described above, as the substrate supporting apparatus 3 is moved in a −x direction via operation S1601 of FIG. 16, a lateral surface of the substrate supporting apparatus 3 in the x-axis direction and an internal lateral surface of the ring 8 facing the lateral surface of the substrate supporting apparatus 3 in the x-axis direction may be exposed to the reaction space 5. That is, the layer 25 b may be exposed in the reaction space 5.

Next, a cleaning gas may be supplied to the reaction space 5. Here, the lateral surface of the substrate supporting apparatus 3 and the internal lateral surface of the ring 8 that are exposed to the reaction space 5 may be cleaned. That is, as illustrated in FIG. 17B, the thin layer 25 b deposited on the lateral surface of the substrate supporting apparatus 3 and the internal lateral surface of the ring 8 may be removed (250 b).

In order to prevent a cleaning gas in the reaction space 5 from entering the chamber inner space 10 through the gap G, the cleaning method may further include supplying a gas to the lower space 10 of the substrate supporting apparatus 3 during supplying a cleaning gas to the upper space 5 of the substrate supporting apparatus 3.

Next, referring to FIGS. 16 and 17C, according to operation S1603 of FIG. 16, an operation of moving the substrate supporting apparatus 3 in the second direction (x-axis direction) by the second preset distance ((D−C)/2) may be performed.

In operation S1603 of FIG. 16, the substrate supporting apparatus 3 does not push the ring 8 while it is being moved, and thus, the position of the ring 8 is not changed. Accordingly, also when operation S1603 is performed, on the left, a distance from the outer wall of the ring 8 to the step portion S is still e −((D−C)/2−A1).

In addition, due to movement of the substrate supporting apparatus 3, on the left, a gap distance between the substrate supporting apparatus 3 and the ring 8 is (D−C)/2, and on the right, a gap distance between the substrate supporting apparatus 3 and the ring 8 is also (D−C)/2. That is, according to operation S1601 and operation S1603, the substrate supporting apparatus 3 is centered with respect to the ring 8 on an x-axis, and at the same time, the thin layer 25 b is removed.

Next, referring to FIGS. 16 and 17D, according to operation S1605 of FIG. 16, the substrate supporting apparatus 3 may be moved in the second direction (x-axis direction) by the second preset distance.

In the present embodiment, the first preset distance is (D−C)/2, and thus, during operation S1605, the substrate supporting apparatus 3 contacts the ring 8 after moving by (D−C)/2. In operation S1605, the substrate supporting apparatus 3 does not push the ring 8 while it is being moved, and thus, the position of the ring 8 is not changed.

As illustrated in FIG. 17D, as the substrate supporting apparatus 3 is moved in the second direction (an x-axis direction) via operation S1605 of FIG. 16, a lateral surface of the substrate supporting apparatus 3 in an −x-axis direction and an internal lateral surface of the ring 8 facing the lateral surface of the substrate supporting apparatus 3 in an −x-axis direction may be exposed to the reaction space 5. That is, a layer 25 a may be exposed to the reaction space 5.

Next, a cleaning gas may be supplied to the reaction space 5. Here, the lateral surface of the substrate supporting apparatus 3 and the internal lateral surface of the ring 8 that are exposed to the reaction space 5 may be cleaned. That is, as illustrated in FIG. 17E, the thin layer 25 a deposited on the lateral surface of the substrate supporting apparatus 3 and the internal lateral surface of the ring 8 may be removed (250 a).

In order to prevent a cleaning gas in the reaction space 5 from entering the chamber inner space 10 through the gap G, the cleaning method may further include supplying a gas to the lower space 10 of the substrate supporting apparatus 3 during supplying a cleaning gas to the upper space 5 of the substrate supporting apparatus 3.

Next, referring to FIGS. 16 and 17F, operation S1607 of FIG. 16 may be performed, and the substrate supporting apparatus 3 may be moved in the first direction (an −x-axis direction) by the second preset distance ((D−C)/2).

In operation S1607 of FIG. 16, the substrate supporting apparatus 3 does not push the ring 8 while it is being moved, and thus, the position of the ring 8 is not changed.

In addition, due to movement of the substrate supporting apparatus 3, on the left, a gap distance between the substrate supporting apparatus 3 and the ring 8 is (D−C)/2, and on the right, a gap distance between the substrate supporting apparatus 3 and the ring 8 is also (D−C)/2. That is, according to operation S1603 and operation S1605, the substrate supporting apparatus 3 is centered with respect to the ring 8 on an x-axis, and at the same time, the thin layers 25 a and 25 b are removed (250 a, 250 b).

After operations S1601 through operation S1607 are performed, a final position of the substrate supporting apparatus 3 (that is, a position of the substrate supporting apparatus 3 in FIG. 17F) is identical to an initial position of the substrate supporting apparatus 3 (that is, a position of the substrate supporting apparatus 3 in FIG. 15). Nevertheless, compared with FIGS. 15 and 17F, the substrate supporting apparatus 3 slanted to the left with respect to the ring 8 is centered according to operation S1601 through operation S1607 of FIG. 16. This is because, during operation S1601 through operation S1607, a position of the ring 8 is varied by the movement of substrate supporting apparatus 3. In practice, the ring 8 of FIG. 17F is moved to the left compared to the ring 8 by (D−C)/2−A1, compared to FIG. 15.

FIGS. 17A through 17F illustrate a process of cleaning blind spots while centering the substrate supporting apparatus 3 with respect to the ring 8 on an x-axis by performing operation S1601 through operation S1607 of FIG. 16. Similarly, when operation S1609 through operation S1615 of FIG. 16 are performed with respect to a y-axis, the substrate supporting apparatus 3 may be centered relative to the ring 8 also on the y-axis, and the other blind spots will also be cleaned. That is, by performing operation S1601 through operation S1615 of FIG. 16, the substrate supporting apparatus 3 may be centered with respect to the ring 8, and at the same time, blind spots between the substrate supporting apparatus 3 and the ring 8 may be cleaned.

According to the substrate cleaning method and the substrate processing method of the present disclosure, by moving the substrate supporting apparatus vertically or horizontally, cleaning may be performed efficiently. In addition, blind spots may be cleaned without additional wet cleaning and without having to disassemble the substrate processing apparatus, and thus, maintenance of the substrate processing apparatus may be easy. In addition, according to the substrate cleaning method and the substrate processing method of the present disclosure, while cleaning the blind spots, the substrate supporting apparatus may be centered with respect to the ring, and thus, maintenance of the substrate processing apparatus may be efficient.

It should be understood that embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in other embodiments.

While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the following claims. 

What is claimed is:
 1. A method of cleaning a substrate processing apparatus including one or more reactors, wherein each reactor comprises: a substrate supporting apparatus; and a ring surrounding the substrate supporting apparatus, wherein a gap is present between the substrate supporting apparatus and the ring, and wherein an upper space of the substrate supporting apparatus communicates with a lower space of the substrate supporting apparatus via the gap, wherein the method comprises: moving the substrate supporting apparatus relative to the ring; and supplying a cleaning gas to the upper space of the substrate supporting apparatus.
 2. The method of claim 1, wherein the moving of the substrate supporting apparatus relative to the ring comprises: a first operation of moving the substrate supporting apparatus in a first direction by a first preset distance; a second operation of moving the substrate supporting apparatus in a second direction by the first preset distance; a third operation of moving the substrate supporting apparatus in the second direction by a second preset distance; and a fourth operation of moving the substrate supporting apparatus in the first direction by the second preset distance, wherein the second direction is opposite to the first direction.
 3. The method of claim 2, wherein the first direction or the second direction is a thickness direction of the substrate supporting apparatus.
 4. The method of claim 3, wherein the first preset distance is equal to or less than a thickness of the substrate supporting apparatus.
 5. The method of claim 3, wherein the second preset distance is equal to or less than a thickness of the ring.
 6. The method of claim 2, wherein the first direction or the second direction is a radius direction of the substrate supporting apparatus.
 7. The method of claim 6, wherein the first preset distance or the second preset distance is (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2.
 8. The method of claim 6, wherein the moving of the substrate supporting apparatus relative to the ring comprises: a fifth operation of moving the substrate supporting apparatus in a third direction by a third preset distance; a sixth operation of moving the substrate supporting apparatus in a fourth direction by the third preset distance; a seventh operation of moving the substrate supporting apparatus in the fourth direction by a fourth preset distance; and an eighth operation of moving the substrate supporting apparatus in the third direction by the fourth preset distance, wherein the third direction is opposite to the fourth direction and is perpendicular to the first direction and the second direction.
 9. The method of claim 2, wherein the cleaning gas is continuously supplied in the first through fourth operations.
 10. The method of claim 2, wherein the cleaning gas is supplied between the first operation and the second operation and between the third operation and the fourth operation.
 11. The method of claim 10, wherein the cleaning gas is further supplied before the first operation, wherein a supply period of the cleaning gas between the first operation and the second operation and between the third operation and the fourth operation is less than a supply period before the first operation.
 12. The method of claim 1, further comprising supplying a gas to the lower space of the substrate supporting apparatus during an operation of supplying a cleaning gas to the upper space of the substrate supporting apparatus, wherein the gas supplied to the lower space prevents the cleaning gas in the upper space from entering the lower space through the gap.
 13. The method of claim 1, wherein, during the supplying of a cleaning gas to the upper space of the substrate supporting apparatus, a thin layer deposited on a lateral surface of the substrate supporting apparatus or an internal lateral surface of the ring is removed.
 14. The method of claim 1, wherein the method is performed every time when a series of processings or a plurality of series of processings on one or more substrates are completed.
 15. The method of claim 1, wherein the method is performed on each reactor simultaneously or at different times.
 16. A method of cleaning a substrate processing apparatus including one or more reactors, wherein each reactor comprises: an upper body; a substrate supporting apparatus; and a ring surrounding the substrate supporting apparatus and arranged between the substrate supporting apparatus and the upper body, wherein the upper body and the substrate supporting apparatus form a reaction space, wherein the method comprises: moving the substrate supporting apparatus to expose a portion of a lateral surface of the substrate supporting apparatus or a portion of an internal lateral surface of the ring, to a reaction space; and supplying a cleaning gas to the reaction space.
 17. The method of claim 16, wherein, while supplying a cleaning gas to the reaction space, an exposed portion of the lateral surface of the substrate supporting apparatus or an exposed portion of the internal lateral surface of the ring is cleaned.
 18. A substrate processing method of a substrate processing apparatus including a plurality of reactors, wherein each reactor comprises: a substrate supporting apparatus; and a ring surrounding the substrate supporting apparatus, wherein a gap is present between the substrate supporting apparatus and the ring, wherein a surface of the ring is in contact with the substrate supporting apparatus as the substrate supporting apparatus moves and is installed to be movable via a pushing force of the substrate supporting apparatus, wherein the substrate processing method comprises: a first operation of moving the substrate supporting apparatus in a first direction by a first preset distance; a second operation of moving the substrate supporting apparatus in a second direction by a second preset distance; a third operation of moving the substrate supporting apparatus in the second direction by the first preset distance; a fourth operation of moving the substrate supporting apparatus in the first direction by the second preset distance; a fifth operation of moving the substrate supporting apparatus in a third direction by the first preset distance; a sixth operation of moving the substrate supporting apparatus in a fourth direction by the second preset distance; a seventh operation of moving the substrate supporting apparatus in the fourth direction by the first preset distance; an eighth operation of moving the substrate supporting apparatus in the third direction by the second preset distance; and supplying a cleaning gas to an upper portion of the substrate supporting apparatus, wherein the second direction is opposite to the first direction, and the fourth direction is perpendicular to the first direction and the second direction and is opposite to the third direction.
 19. The substrate processing method of claim 18, wherein the supplying of a cleaning gas to the upper portion of the substrate supporting apparatus is continuously performed during the first operation through the eighth operation, or between the first operation and the second operation, between the third operation and the fourth operation, between the fifth operation and the sixth operation, and between the seventh operation and the eighth operation.
 20. The substrate processing method of claim 18, wherein the first preset distance may be equal to or greater than (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2, and wherein the second preset distance may be (an inner diameter of the ring−an outer diameter of the substrate supporting apparatus)/2, wherein the substrate supporting apparatus is centered with respect to the ring, and at the same time, a lateral surface of the substrate supporting apparatus and an internal lateral surface of the ring are cleaned by the substrate processing method. 